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Not using Excel. In a clinical trial for an insomnia treatment, a group of 22 subjects had a mean "wake time" of 94.3 minutes after receiving the treatment and a standard deviation of 23.1 minutes.  a) construct a 95% confidence interval for the mean.  b) if the subject has a mean "wake time" of 100 minutes before this treatment, does it seem like this treatment is effective? Please explain.  c) suppose the group had a standard deviation of 40.2 minutes for the "wake time". Construct a 90% confidence interval for the standard deviation.  please show written solving steps for each part.

Not using Excel. In a clinical trial for an insomnia treatment, a group of 22 subjects had a mean "wake time" of 94.3 minutes after receiving the treatment and a standard deviation of 23.1 minutes.  a) construct a 95% confidence interval for the mean.  b) if the subject has a mean "wake time" of 100 minutes before this treatment, does it seem like this treatment is effective? Please explain.  c) suppose the group had a standard deviation of 40.2 minutes for the "wake time". Construct a 90% confidence interval for the standard deviation.  please show written solving steps for each part.

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Not using Excel. In a clinical trial for an insomnia treatment, a group of 22 subjects had a mean "wake time" of 94.3 minutes after receiving the treatment and a standard deviation of 23.1 minutes. 
a) construct a 95% confidence interval for the mean. 
b) if the subject has a mean "wake time" of 100 minutes before this treatment, does it seem like this treatment is effective? Please explain. 
c) suppose the group had a standard deviation of 40.2 minutes for the "wake time". Construct a 90% confidence interval for the standard deviation. 
please show written solving steps for each part. 

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